Flex 2

The Fitbit Flex 2 is the most customizable Fitbit. The tracker can be worn in a slim wrist strap or in a bangle or pendant. It’s also one of the only waterproof Fitbits which means it’s useful for any keen swimmers.

Alta

The Fitbit Alta is a great starting off point as a Fitbit. It’s simple, small and covers all the basic functions you might need. Like all Fitbits it measures steps, calories and distance and it’s also got a clock, a sleep-tracker and a silent alarm for a more peaceful morning wakeup.

Alta HR

The Fitbit Alta HR is a step up from the standard Alta. Along with the basic features, the Alta HR is slightly larger and provides a PurePulse heart rate monitor which allows you to track your cardio fitness levels in the Fitbit dashboard.

Charge 2

The Fitbit Charge 2 has all the same features as the Alta HR, but also has a larger screen to allow more visible data on the go. It also provides feedback on how many floors you’ve climbed in a day, has multi-sport tracking and has connected GPS.

Blaze

The fitbit Blaze has one of the largest screens you can get on a Fitbit and has a few features that distinguish it from the Charge 2 model. It includes on-screen workouts which are handy for a short gym session and it also allows users to control their music on-screen.

Ionic

The Fitbit Ionic is the newest and most premium Fitbit offering has a complete range of features displayed on a large screen. It can store and play music, make contactless payments and is waterproof to boot. The Ionic has built-in GPS and automatically registers when you’ve started a workout. It’s also the most expensive Fitbit on the market, but is still cheaper than the latest Apple Watch.

Key features: Built in GPS, music storage and control, in-depth sleep tracking, apps.

Fitbit Zip

The Fitbit Zip remains the company’s most affordable option. The Zip is a small shell that can easily be clipped to a belt or waistband and offers basic data on steps accumulated, calories burnt and distance covered, all wirelessly synced to your phone or PC.